Determining Current SCSI Addresses
This section provides directions for installing the PCI SCSI-2 Fast/Wide Single-Ended
Adapter.
Manufacturers use many different methods to set SCSI addresses, including
jumpers, dual inline package (DIP) switches, push buttons, or dials. If your SCSI
device is new, check the manual that shipped with the device to see if it specifies a
default SCSI address. If one is not specified, check how SCSI addresses are set,
then check the device itself for the current SCSI address. Be sure to maintain a list
of all your SCSI addresses for future reference (your system unit documentation may
provide a table where you can record them).
Important: Before you set the SCSI address, you must first determine which
addresses are available; that is, not already in use by other SCSI devices and
adpaters installed in your system. Each SCSI device or adapter must have a unique
address. To determine the SCSI addresses of the devices/adapters already
installed, enter the following command:
lsdev -Cs scsi
This command returns the following information:
Column 1: device name (for example, scsið)
Column 2: device status (for example, Available)
Column 3: SCSI information (the format is: nn-nn-nn-s,b)
Column 4: device type (for example, CD-ROM drive, 2.3GB tape drive, etc.)
The
s
in the
nn-nn-nn
returned in Column 3 is the SCSI address of the associated
device. The
b
is the SCSI bus number for that device.
Record the names and SCSI addresses of your installed SCSI devices in Table A-1
on page A-3. This helps you select non-conflicting addresses for any new devices
you add.
Planning SCSI Addresses
Make sure no two SCSI devices have the same address, and that no device uses
the SCSI address 7, which is reserved for the adapter.
Note:
SCSI addresses are
not in sequential order from highest to lowest priority. Refer to Table A-1 on page
A-3 for the priority associated with each SCSI address.
A-2
PCI SCSI-2 Fast/Wide Single-Ended Adapter Installation Guide
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